\begin{tikzpicture}
    \pgfmathsetmacro{\R}{1.5}

    \tkzDefPoints{0/0/O}
    \tkzDefPoint(270:\R){A}
    \tkzDefShiftPoint[A](2,0){B}
    \tkzDefShiftPoint[A](-2,0){B'}
    \tkzDefPoint(140:\R){C}

    \tkzDrawPoint(O)
    \tkzDrawArc[dashed](O,A)(C)
    \tkzDrawArc[thick](O,C)(A)
    \tkzDrawSegment[red](O,C)
    \tkzLabelSegment[above](O,C){$R$}
    \tkzDrawSegment[dashed](O,A)
    \tkzLabelPoints[right](O)
    \tkzLabelPoints[left](C)

    \tkzDrawSegment[thick](A,B)
    \tkzDrawSegment[dashed](A,B')
    \tkzLabelSegment[pos=1, left](B,B'){$l$}
    \tkzLabelPoints[below](A)
    \tkzLabelPoints[right](B)
\end{tikzpicture}

